A=[-2 3;3 -2];
B=[1 1;1 1];
C=[2 1;1 -2];
D=0;
n=2;
CAM=ctrb(A,B);
rcam=rank(CAM);
if rcam==n
    disp('System is controlled')
elseif rcam<n
    disp('System is no controlled')
end
ob=obsv(A,C);
roam=rank(ob);
if roam==n
    disp('System is observable')
elseif roam~=n
    disp('System is no observable')
end